脱式计算(能简便的要简便)900-300÷60 ...

2024-11-23 04:49:56
推荐回答(1个)
回答(1):

(1)900-300÷60
=900-5
=895;

(2)16×30÷40       
=480÷40
=12;

(3)750÷(23+27)
=750÷50
=15;

(4)270÷6÷5   
=270÷(6×5)
=270÷30
=9;

(5)720÷4×9 
=180×9
=1620;

(6)210÷35
=210÷(7×5)
=210÷7÷5
=30÷5
=6.